JP5019803B2 - ゴム組成物及びそれを用いたタイヤ - Google Patents
ゴム組成物及びそれを用いたタイヤ Download PDFInfo
- Publication number
- JP5019803B2 JP5019803B2 JP2006181379A JP2006181379A JP5019803B2 JP 5019803 B2 JP5019803 B2 JP 5019803B2 JP 2006181379 A JP2006181379 A JP 2006181379A JP 2006181379 A JP2006181379 A JP 2006181379A JP 5019803 B2 JP5019803 B2 JP 5019803B2
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- JP
- Japan
- Prior art keywords
- group
- natural rubber
- meth
- rubber
- acrylate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 229920001971 elastomer Polymers 0.000 title claims description 79
- 239000005060 rubber Substances 0.000 title claims description 79
- 239000000203 mixture Substances 0.000 title claims description 63
- -1 hydrazo group Chemical group 0.000 claims description 135
- 244000043261 Hevea brasiliensis Species 0.000 claims description 123
- 229920003052 natural elastomer Polymers 0.000 claims description 123
- 229920001194 natural rubber Polymers 0.000 claims description 123
- 239000006229 carbon black Substances 0.000 claims description 57
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 125000003277 amino group Chemical group 0.000 claims description 18
- 125000000623 heterocyclic group Chemical group 0.000 claims description 18
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 18
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 16
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 15
- 125000002560 nitrile group Chemical group 0.000 claims description 11
- 125000003700 epoxy group Chemical group 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 125000003368 amide group Chemical group 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 claims description 5
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 5
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 claims description 5
- 125000005462 imide group Chemical group 0.000 claims description 5
- 125000001841 imino group Chemical group [H]N=* 0.000 claims description 5
- 125000005740 oxycarbonyl group Chemical group [*:1]OC([*:2])=O 0.000 claims description 5
- 125000002228 disulfide group Chemical group 0.000 claims description 4
- 125000000475 sulfinyl group Chemical group [*:2]S([*:1])=O 0.000 claims description 4
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 4
- 125000002813 thiocarbonyl group Chemical group *C(*)=S 0.000 claims description 4
- 125000000101 thioether group Chemical group 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 65
- 239000000178 monomer Substances 0.000 description 57
- 229920006173 natural rubber latex Polymers 0.000 description 53
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 52
- 150000001336 alkenes Chemical class 0.000 description 43
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 24
- 239000002994 raw material Substances 0.000 description 19
- 150000001875 compounds Chemical class 0.000 description 17
- 239000003995 emulsifying agent Substances 0.000 description 15
- 229920000126 latex Polymers 0.000 description 14
- 239000004816 latex Substances 0.000 description 14
- 238000005649 metathesis reaction Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- SJIXRGNQPBQWMK-UHFFFAOYSA-N DEAEMA Natural products CCN(CC)CCOC(=O)C(C)=C SJIXRGNQPBQWMK-UHFFFAOYSA-N 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000003505 polymerization initiator Substances 0.000 description 10
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000001035 drying Methods 0.000 description 9
- 125000000524 functional group Chemical group 0.000 description 9
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 125000001302 tertiary amino group Chemical group 0.000 description 9
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 8
- 125000004103 aminoalkyl group Chemical group 0.000 description 8
- 238000010008 shearing Methods 0.000 description 8
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 8
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 7
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 229920002554 vinyl polymer Polymers 0.000 description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 6
- KDCGOANMDULRCW-UHFFFAOYSA-N 7H-purine Chemical compound N1=CNC2=NC=NC2=C1 KDCGOANMDULRCW-UHFFFAOYSA-N 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 6
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 6
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 6
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 6
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 5
- KFDVPJUYSDEJTH-UHFFFAOYSA-N 4-ethenylpyridine Chemical compound C=CC1=CC=NC=C1 KFDVPJUYSDEJTH-UHFFFAOYSA-N 0.000 description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 5
- 238000010306 acid treatment Methods 0.000 description 5
- 150000001735 carboxylic acids Chemical class 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 5
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 4
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 150000003926 acrylamides Chemical class 0.000 description 4
- 238000007259 addition reaction Methods 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 4
- 150000001408 amides Chemical class 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000004945 emulsification Methods 0.000 description 4
- 239000001530 fumaric acid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010559 graft polymerization reaction Methods 0.000 description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 4
- 239000011976 maleic acid Substances 0.000 description 4
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 4
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 4
- 238000006011 modification reaction Methods 0.000 description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 125000004076 pyridyl group Chemical group 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 4
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 4
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 3
- UUZJJNBYJDFQHL-UHFFFAOYSA-N 1,2,3-triazolidine Chemical compound C1CNNN1 UUZJJNBYJDFQHL-UHFFFAOYSA-N 0.000 description 3
- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 description 3
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- SXIFAEWFOJETOA-UHFFFAOYSA-N 4-hydroxy-butyl Chemical group [CH2]CCCO SXIFAEWFOJETOA-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HNDVDQJCIGZPNO-YFKPBYRVSA-N L-histidine Chemical compound OC(=O)[C@@H](N)CC1=CN=CN1 HNDVDQJCIGZPNO-YFKPBYRVSA-N 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 3
- 230000001112 coagulating effect Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- UFULAYFCSOUIOV-UHFFFAOYSA-N cysteamine Chemical compound NCCS UFULAYFCSOUIOV-UHFFFAOYSA-N 0.000 description 3
- 238000007720 emulsion polymerization reaction Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- HNDVDQJCIGZPNO-UHFFFAOYSA-N histidine Natural products OC(=O)C(N)CC1=CN=CN1 HNDVDQJCIGZPNO-UHFFFAOYSA-N 0.000 description 3
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- 238000004898 kneading Methods 0.000 description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 3
- 229960003151 mercaptamine Drugs 0.000 description 3
- 239000012046 mixed solvent Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- SBRDEWUKACUNPY-UHFFFAOYSA-N n-(2-phenylethenyl)aniline Chemical compound C=1C=CC=CC=1NC=CC1=CC=CC=C1 SBRDEWUKACUNPY-UHFFFAOYSA-N 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 3
- CPNGPNLZQNNVQM-UHFFFAOYSA-N pteridine Chemical compound N1=CN=CC2=NC=CN=C21 CPNGPNLZQNNVQM-UHFFFAOYSA-N 0.000 description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 3
- 238000007717 redox polymerization reaction Methods 0.000 description 3
- 239000012763 reinforcing filler Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 125000003396 thiol group Chemical group [H]S* 0.000 description 3
- 150000003852 triazoles Chemical class 0.000 description 3
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 2
- PURYCGFBBYVQEQ-UHFFFAOYSA-N 1-(dimethylamino)ethanethiol Chemical compound CC(S)N(C)C PURYCGFBBYVQEQ-UHFFFAOYSA-N 0.000 description 2
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- STMDPCBYJCIZOD-UHFFFAOYSA-N 2-(2,4-dinitroanilino)-4-methylpentanoic acid Chemical compound CC(C)CC(C(O)=O)NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O STMDPCBYJCIZOD-UHFFFAOYSA-N 0.000 description 2
- AOCFPNHJAUWWQS-UHFFFAOYSA-N 2-(3-methylbuta-1,3-dienyl)-n-phenylaniline Chemical compound CC(=C)C=CC1=CC=CC=C1NC1=CC=CC=C1 AOCFPNHJAUWWQS-UHFFFAOYSA-N 0.000 description 2
- VNSCVITYYHPXKX-UHFFFAOYSA-N 2-(4-anilinophenyl)-3-phenylbut-2-enedioic acid Chemical compound C=1C=CC=CC=1C(C(=O)O)=C(C(O)=O)C(C=C1)=CC=C1NC1=CC=CC=C1 VNSCVITYYHPXKX-UHFFFAOYSA-N 0.000 description 2
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- LCFYCLRCIJDYQD-UHFFFAOYSA-N 2-ethenyl-5-methylpyridine Chemical compound CC1=CC=C(C=C)N=C1 LCFYCLRCIJDYQD-UHFFFAOYSA-N 0.000 description 2
- FCYVWWWTHPPJII-UHFFFAOYSA-N 2-methylidenepropanedinitrile Chemical compound N#CC(=C)C#N FCYVWWWTHPPJII-UHFFFAOYSA-N 0.000 description 2
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- TYZFMFVWHZKYSE-UHFFFAOYSA-N 3-mercaptohexanol Chemical compound CCCC(S)CCO TYZFMFVWHZKYSE-UHFFFAOYSA-N 0.000 description 2
- REWLXMVGEZMKSG-UHFFFAOYSA-N 3-prop-1-en-2-ylphenol Chemical compound CC(=C)C1=CC=CC(O)=C1 REWLXMVGEZMKSG-UHFFFAOYSA-N 0.000 description 2
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- UCUUFSAXZMGPGH-UHFFFAOYSA-N penta-1,4-dien-3-one Chemical compound C=CC(=O)C=C UCUUFSAXZMGPGH-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- FFWJHVGUAKWTKW-UHFFFAOYSA-N pyridine-3-thiol Chemical compound SC1=CC=CN=C1 FFWJHVGUAKWTKW-UHFFFAOYSA-N 0.000 description 1
- HBCQSNAFLVXVAY-UHFFFAOYSA-N pyrimidine-2-thiol Chemical compound SC1=NC=CC=N1 HBCQSNAFLVXVAY-UHFFFAOYSA-N 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- NJRXVEJTAYWCQJ-UHFFFAOYSA-N thiomalic acid Chemical compound OC(=O)CC(S)C(O)=O NJRXVEJTAYWCQJ-UHFFFAOYSA-N 0.000 description 1
- 229940103494 thiosalicylic acid Drugs 0.000 description 1
- LYRCQNDYYRPFMF-UHFFFAOYSA-N trimethyltin Chemical compound C[Sn](C)C LYRCQNDYYRPFMF-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
天然ゴム分子中に極性基を含有する変性天然ゴム100質量部に対して、
窒素吸着比表面積(N2SA)が20〜170 m2/gであり、下記式(I):
[200℃〜400℃の範囲の加熱減量(質量%)]/N2SA ≧ 0.0025 ・・・ (I)
の関係を満たすカーボンブラックを10〜150質量部配合してなることを特徴とする。
[200℃〜400℃の範囲の加熱減量(質量%)]/N2SA ≧ 0.0025 ・・・ (I)
の関係を満たす。上記式(I)の関係を満たさないカーボンブラックを使用した場合、ゴム組成物の低発熱性を十分に改善できないことがある。カーボンブラックを200℃〜400℃で加熱した際の質量減少は、主として、カーボンブラック表面のカルボキシル基の消滅に起因する。そして、上記式(I)の関係を満たすカーボンブラックは、単位表面積当りの200℃〜400℃での加熱減量が大きい、即ち、カルボキシル基等の官能基が多く、また、該官能基は、上記変性天然ゴムとの混練中に、変性天然ゴムの極性基と相互作用するため、カーボンブラックの変性天然ゴムに対する分散性が大幅に向上し、ゴム組成物の低発熱性を大幅に改善することができる。なお、カーボンブラックの官能基としては、上記カルボキシル基の他に、スルホン基等の比較的低温で脱離する官能基を挙げることができる。
(天然ゴムラテックスの変性反応工程)
フィールドラテックスをラテックスセパレーター[斎藤遠心工業製]を用いて回転数7500rpmで遠心分離して、乾燥ゴム濃度60%の濃縮ラテックスを得た。この濃縮ラテックス1000gを、撹拌機及び温調ジャケットを備えたステンレス製反応容器に投入し、予め10mLの水と90mgの乳化剤[エマルゲン1108,花王株式会社製]をN,N-ジエチルアミノエチルメタクリレート 3.0gに加えて乳化したものを990mLの水と共に添加し、これらを窒素置換しながら常温で30分間撹拌した。次に、重合開始剤としてtert-ブチルハイドロパーオキサイド 1.2gとテトラエチレンペンタミン 1.2gとを加え、40℃で30分間反応させることにより、変性天然ゴムラテックスを得た。
上記変性天然ゴムラテックスにギ酸を加えpHを4.7に調整し、変性天然ゴムラテックスを凝固させた。このようにして得られた固形物をクレーパーで5回処理し、シュレッダーに通してクラム化した後、熱風式乾燥機により110℃で210分間乾燥して変性天然ゴムAを得た。このようにして得られた変性天然ゴムAの質量から、単量体として加えたN,N-ジエチルアミノエチルメタクリレートの転化率が100%であることが確認された。また、該変性天然ゴムAを石油エーテルで抽出し、更にアセトンとメタノールの2:1混合溶媒で抽出することによりホモポリマーの分離を試みたが、抽出物を分析したところホモポリマーは検出されず、添加した単量体の100%が天然ゴム分子に導入されていることが確認された。従って、得られた変性天然ゴムAの極性基含有量は、天然ゴムラテックス中のゴム成分に対して0.027mmol/gである。
単量体としてN,N-ジエチルアミノエチルメタクリレート 3.0gの代わりに、4-ビニルピリジン 1.7gを加える以外は、上記製造例1と同様にして変性天然ゴムBを得た。また、変性天然ゴムAと同様にして、変性天然ゴムBを分析したところ、添加した単量体の100%が天然ゴム分子に導入されていることが確認された。従って、変性天然ゴムBの極性基含有量は、天然ゴムラテックス中のゴム成分に対して0.027mmol/gである。
フィールドラテックスに水を添加して、乾燥ゴム濃度30%のラテックスを得た。このラテックス2000gを、撹拌機及び温調ジャケットを備えたステンレス製反応容器に投入し、予め10mLの水と90mgの乳化剤[エマルゲン1108,花王株式会社製]を2-メルカプトエチルアミン 1.2gに加えて乳化したものを添加し、撹拌しながら60℃で8時間反応させることにより、変性天然ゴムラテックスCを得た。その後、製造例1と同様に凝固及び乾燥することにより変性天然ゴムCを得た。また、得られた変性天然ゴムCの極性基含有量を熱分解ガスクロマトグラフ−質量分析計を用いて分析したところ、天然ゴムラテックス中のゴム成分に対して0.021mmol/gであった。
上記濃縮ラテックス1000gを、撹拌機及び温調ジャケットを備えたステンレス製反応容器に投入し、予め10mLの水と90mgの乳化剤[エマルゲン1108,花王株式会社製]をN,N-ジエチルアミノエチルメタクリレート 3.0gに加えて乳化したものを990mLの水と共に添加し、これらを窒素置換しながら30分間撹拌した。次に、メタセシス触媒としてビス(トリシクロヘキシルホスフィン)ベンジリデンルテニウムジクロライド 3.0gを加え、40℃で7時間反応させることにより、変性天然ゴムラテックスDを得た。その後、製造例1と同様に凝固及び乾燥することにより変性天然ゴムDを得た。このようにして得られた変性天然ゴムDの質量から、添加したN,N-ジエチルアミノエチルメタクリレートの転化率が84%であることが確認された。また、該変性天然ゴムDを石油エーテルで抽出し、更にアセトンとメタノールの2:1混合溶媒で抽出することにより天然ゴム分子に導入されていないオレフィン同士の反応物の分離を試みたところ、天然ゴム分子に導入されていないオレフィン同士の反応物が仕込みオレフィン量の6%検出された。従って、上記変性天然ゴムDの極性基含有量は、天然ゴムラテックス中のゴム成分に対して0.021mmol/gである。
フィールドラテックスにギ酸を加えpHを4.7に調整し、該ラテックスを凝固させ、更に、得られた固形物をクレーパーで5回処理し、シュレッダーに通してクラム化した。次に、得られた凝固物の乾燥ゴム含有量を求め、乾燥ゴム量換算で600gの凝固物と、N,N-ジエチルアミノエチルメタクリレート 3.0gと、tert-ブチルハイドロパーオキサイド(t-BHPO)1.2gとを混練機内で室温にて30rpmで2分間練り込み、均一に分散させた。次に、得られた混合物にテトラエチレンペンタミン(TEPA)1.2gを均一に加えながら、神戸製鋼製二軸混練押出機[同方向回転スクリュー径=30mm, L/D=35, ベントホール3ヶ所]を用い、バレル温度120℃、回転数100rpmで機械的せん断力を加えながら押し出すことにより、乾燥した変性天然ゴムEを得た。また、得られた変性天然ゴムEの質量から、単量体として加えたN,N-ジエチルアミノエチルメタクリレートの転化率は、83%であった。更に、該変性天然ゴムEを石油エーテルで抽出し、更にアセトンとメタノールの2:1混合溶媒で抽出することによりホモポリマーの分離を試みたところ、ホモポリマーが仕込みモノマー量の7%検出された。従って、上記変性天然ゴムEの極性基含有量は、天然ゴム原材料中の固形ゴム成分に対して0.021mmol/gである。
上記天然ゴムラテックスを変性反応工程を経ずに、直接、凝固及び乾燥させて天然ゴムFを調製した。
比較としてカーボンブラックA(N234)及びカーボンブラックB(N330)を使用し、また、カーボンブラックA(N234)を1%のHNO3水溶液に加え、室温で30分撹拌し、懸濁液を濾過した後、150℃で12時間乾燥させてカーボンブラックCを調製し、更に、カーボンブラックB(N330)を1%のHNO3水溶液に加え、室温で30分撹拌し、懸濁液を濾過した後、150℃で12時間乾燥させてカーボンブラックDを調製した。また更に、カーボンブラック(N326)を1%のHNO3水溶液に加え、室温で30分撹拌し、懸濁液を濾過した後、150℃で12時間乾燥させてカーボンブラックEを調製した。
上記のようにして得たカーボンブラックに対し、公知の方法でN2SA吸着比表面積を測定した。また、(i)カーボンブラックを105℃の恒温乾燥機中で1時間乾燥し、デシケータ中で室温まで冷却した後、(ii)TG測定用パン上に約10mgを精秤し、N2ガス中でTGを測定した。次に、(iii)40℃〜600℃まで10℃/minの昇温条件下で、(ii)の初期重量に対する200℃〜400℃までの重量減少%を測定した。結果を表1に示す。
上記(変性)天然ゴム及びカーボンブラックを用い、表2に示す配合処方のゴム組成物を調製し、該ゴム組成物に対して、下記の方法で耐破壊性及び発熱性を測定・評価した。結果を表3に示す。
上記ゴム組成物を加硫して得た試験片に対して、JIS K6251「加硫ゴムの引張試験方法」に準拠して引張試験を行い、引張強さ(Tb)を測定し、比較例1の試験片の引張強さを100として指数表示した。指数値が大きい程、引張強さが大きく、耐破壊性に優れることを示す。
上記ゴム組成物を加硫して得た試験片に対し、TOYOSEIKI製スペクトロメータを用い、動的歪振幅1.0%、周波数15Hz、測定温度50℃で損失正接(tanδ)を測定し、下記の式から発熱性指数を算出した。指数値が小さい程、tanδが低く、低発熱性に優れることを示す。
発熱性指数=(供試試験片のtanδ)/(比較例1の試験片のtanδ)× 100
*2 使用したカーボンブラックの種類を表3に示す.
*3 N-(1,3-ジメチルブチル)-N'-フェニル-p-フェニレンジアミン.
*4 N-シクロヘキシル-2-ベンゾチアゾリルスルフェンアミド.
Claims (4)
- 天然ゴム分子中に極性基を含有する変性天然ゴム100質量部に対して、
窒素吸着比表面積(N2SA)が20〜170 m2/gであり、下記式(I):
[200℃〜400℃の範囲の加熱減量(質量%)]/N2SA ≧ 0.0025 ・・・ (I)
の関係を満たすカーボンブラックを10〜150質量部配合してなることを特徴とするゴム組成物。 - 前記変性天然ゴムの極性基が、アミノ基、イミノ基、ニトリル基、アンモニウム基、イミド基、アミド基、ヒドラゾ基、アゾ基、ジアゾ基、ヒドロキシル基、カルボキシル基、カルボニル基、エポキシ基、オキシカルボニル基、スルフィド基、ジスルフィド基、スルホニル基、スルフィニル基、チオカルボニル基、含窒素複素環基及びスズ含有基からなる群から選ばれる少なくとも一つであることを特徴とする請求項1に記載のゴム組成物。
- 前記変性天然ゴムの極性基含有量が、変性天然ゴムのゴム成分に対して0.001〜0.5 mmol/gであることを特徴とする請求項1に記載のゴム組成物。
- 請求項1〜3のいずれかに記載のゴム組成物をタイヤ部材のいずれかに用いたことを特徴とするタイヤ。
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